SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, poses with his team after winning the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Ezra Shaw/Getty Images) less

SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, poses with his team after winning the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma ... more

Photo: Ezra Shaw, Getty Images

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SONOMA, CA - AUGUST 24: (L-R) Second place finisher Ryan Hunter-Reay, driver of the #28 DHL Honda; race winner Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet; and third place finisher Simon Pagenaud of France, driver of the #77 Schmidt Peterson Hamilton Motorsports Honda, dunk of bucket of ice water on IndyCar CEO Mark Miles for the ALS Ice Bucket Challenge after the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Ezra Shaw/Getty Images) less

SONOMA, CA - AUGUST 24: (L-R) Second place finisher Ryan Hunter-Reay, driver of the #28 DHL Honda; race winner Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet; and third place ... more

Photo: Ezra Shaw, Getty Images

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SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, drinks from a bottle of champagne in victory lane after winning the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Ezra Shaw/Getty Images) less

SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, drinks from a bottle of champagne in victory lane after winning the Verizon IndyCar Series GoPro Grand ... more

Photo: Ezra Shaw, Getty Images

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SONOMA, CA - AUGUST 24: Helio Castroneves of Brazil, driver of the #3 Hitachi Team Penske Chevrolet, races Sebastien Bourdais of France, driver of the #11 Hydroxycut KVSH Racing Chevrolet, during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Todd Warshaw/Getty Images) less

SONOMA, CA - AUGUST 24: Helio Castroneves of Brazil, driver of the #3 Hitachi Team Penske Chevrolet, races Sebastien Bourdais of France, driver of the #11 Hydroxycut KVSH Racing Chevrolet, during the Verizon ... more

Photo: Todd Warshaw, Getty Images

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SONOMA, CA - AUGUST 24: Charlie Kimball, driver of the #83 NovoLog FlexPen Chevrolet, races during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Todd Warshaw/Getty Images) less

SONOMA, CA - AUGUST 24: Charlie Kimball, driver of the #83 NovoLog FlexPen Chevrolet, races during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, ... more

Photo: Todd Warshaw, Getty Images

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SONOMA, CA - AUGUST 24: Sebastian Saavedra of Colombia, driver of the #17 Automatic Fire Sprinklers KV AFS Chevrolet, races during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Todd Warshaw/Getty Images) less

SONOMA, CA - AUGUST 24: Sebastian Saavedra of Colombia, driver of the #17 Automatic Fire Sprinklers KV AFS Chevrolet, races during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on ... more

Photo: Todd Warshaw, Getty Images

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SONOMA, CA - AUGUST 24: Tony Kanaan of Brazil, driver of the #10 Target Chip Ganassi Racing Chevrolet, races Graham Rahal, driver of the #15 National Guard Honda, during the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Todd Warshaw/Getty Images) less

SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, celebrates after winning the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on August 24, 2014 in Sonoma, California. (Photo by Ezra Shaw/Getty Images) less

SONOMA, CA - AUGUST 24: Scott Dixon of New Zealand, driver of the #9 Target Chip Ganassi Racing Chevrolet, celebrates after winning the Verizon IndyCar Series GoPro Grand Prix of Sonoma at Sonoma Raceway on ... more

Scott Dixon, who stayed at a lodge in Sonoma, said he slept for all but the final seconds of the quake and went right back to sleep.

Power and Castroneves encountered mostly mechanical problems in Sunday's GoPro Grand Prix of Sonoma, finishing 10th and 18th. Meanwhile, Dixon took the lead from Mike Conway on the 83rd lap and rode to victory in the 85-lap race.

It was the 10th lead change in the race, resulting in the 35th victory of the 34-year-old New Zealander's career and tying him with Bobby Unser for fifth place in all-time wins. The only drivers with more are A.J. Foyt (67), Mario Andretti (52), Michael Andretti (42) and Al Unser (39).

Dixon, who started third in the No. 9 Target Chip Ganassi Racing car, beat Ryan Hunter-Reay to the finish line by 1.1359 seconds. Simon Pagenaud finished third, overtaking Conway, who ran out of fuel with 350 yards left and finished 14th.

Dixon caught Conway on the uphill turn 2. "I think I caught him by surprise there," he said.

Power leads by 51 points over Castroneves and 81 over Pagenaud in the series standings. The season finale at Auto Club Speedway in Fontana (San Bernardino County) on Saturday night provides double points.

Dixon is in fifth place and said his best shot would be for third place in the final standings. For him to win, he said, "I need a meteor to take out the 12 car (Power)."

Power, the pole sitter Sunday, led for 33 laps but later had to rally from a spin on lap 40 that dropped him from 12th to 20th.

"It took me by surprise when I spun," he said. "That's just racing. I tried to save fuel towards the end, just going for points."

Just before the race, he told a TV crew about his scary experience with the quake. "I thought it was all over," he said. "I thought it was the end of the earth. I didn't think there would be a race today. That was unbelievable. I really thought I was going to die."

Castroneves, his Team Penske teammate, was out of contention early. His front wing was damaged on lap 1 in a multi-car accident triggered by contact between Dixon and James Hinchcliffe. Several laps later he had to pit again to have the right rear wheel guard cut away.

Indy Lights: By a very narrow margin, Gabby Chaves captured the Indy Lights season title and gained a scholarship to the IndyCar series, including a berth in next year's Indianapolis 500.

The Colombian American finished second in the series finale to England's Jack Harvey, and the two finished in a tie for points with the same number of wins (four). Chaves took the next tiebreaker with five second-place finishes to Harvey's one.

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